JP2001198053A - Upright type electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an upright type electric vacuum cleaner capable of compacting a nozzle part and improving dust collecting efficiency. SOLUTION: A suction port 8 and a blow-off port 9 communicating with an almost cylindrical suction space 16 formed inside the nozzle part 3 are arranged. The back flow T of a motor-driven blower 4 is blown off through a blow-off flow passage 14 from the blow-off port 9 to the suction space 16 and a turning air stream is generated. Dust on a surface to be cleaned is blown up and sucked together with a suction air stream S from the suction port 8 and cleaning is efficiently performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upright type vacuum cleaner utilizing the downstream of an electric blower for cleaning.

[0002]

2. Description of the Related Art Conventionally, as an example of this kind of upright type vacuum cleaner, there is one disclosed in Japanese Patent Application Laid-Open No. Hei 7-136082. As shown in FIG. 6, this conventional upright type vacuum cleaner blows air toward a surface M to be cleaned in a running direction of a nozzle portion 102 of a suction port 103 provided in the nozzle portion 102 of the cleaner body 101. An outlet 104 is provided,
A part Z ′ of the wake Z of the suction airflow Y accompanying the driving of the electric blower 105 is returned to the outlet 104 via the return path 106.

Then, the wake Z 'is blown from the outlet 104 onto the surface M to be cleaned, so that the dust on the surface M to be cleaned is blown up. It is configured to collect dust.

[0004]

However, in the above conventional configuration, the wake Z 'of the electric blower 105 is supplied to the outlet 1
Since the recirculation path 106 leading to 04 is provided as a separate path from the area 107 for sucking dust including the suction port 103 in the nozzle section 102, it is difficult to reduce the size and weight of the nozzle section 102. .

[0005] The present invention has been made in view of the above-mentioned conventional problems, and enables the nozzle portion to be made compact.
An object of the present invention is to provide an upright type vacuum cleaner having improved dust collection efficiency.

[0006]

In order to achieve the above object, an upright type vacuum cleaner according to the present invention comprises a first and a second hole in a cylindrical suction space having an opening facing a surface to be cleaned. Forming a swirling airflow in the suction space by applying an airflow from the first hole to the suction space via the electric blower and flowing out the airflow from the second hole through the electric blower. The cleaning surface facing the opening is struck, and the fluttered-up dust is sent from the second hole to the dust collection chamber.

[0007] Further, the electric vacuum cleaner according to the present invention has a cleaner main body having a built-in electric blower, a nozzle portion provided in the cleaner main body for sucking dust, and a cleaning surface provided in the nozzle portion. A substantially cylindrical suction space having an opening facing the suction space, a suction port communicating with one end of the suction space in the axial direction for sucking dust, and a suction port communicating with the other end of the suction space in the axial direction of the electric blower. An outlet for blowing out the wake to the suction space and a return path for guiding the wake to the outlet are provided.

[0008] Further, an upright type vacuum cleaner according to the present invention has a vacuum cleaner body having a built-in electric blower, a nozzle portion provided in the vacuum cleaner body for sucking dust, and a cover provided inside the nozzle portion. A substantially cylindrical suction space having an opening facing the cleaning surface, a suction port communicating with both ends of the suction space in the axial direction for sucking dust, and a communication with a substantially central portion of the suction space in the axial direction; It is characterized by comprising an outlet for blowing the wake of the electric blower into the suction space, and a return path for guiding the wake to the outlet.

According to these configurations, the dust on the surface to be cleaned is blown up by the wake of the electric blower blown out from the outlet through the return path into the suction space, and is efficiently sucked from the suction port together with the suction airflow.

If a rotatable rotary brush is provided in the suction space, the dust collection efficiency can be further improved.

In particular, when the wake is blown into the suction space from a tangential direction of a side cross section of the suction space, the blown wake is swirled along the inner wall of the suction space. Since dust on the surface to be cleaned is swept up by the swirling airflow generated in the suction space, dust can be efficiently collected.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> A first embodiment of the present invention
An embodiment will be described with reference to the drawings. FIG. 1 is a transparent external perspective view of the upright type vacuum cleaner according to the present embodiment. As shown in FIG. 1, the cleaner body 1 is provided with a handle 2 for moving the body 1 at an upper part, and a nozzle part 3 for sucking dust at a lower part. Reference numeral 4 denotes an electric blower, on which a dust bag 5 is attached. The electric blower 4 and the dust bag 5 are housed in the main body 1, and a lid 6 for taking the dust bag 5 in and out is provided on the front surface of the main body 1.

An exhaust port 7 downstream of the electric blower 4 is provided on the back of the cleaner body 1. Further, a substantially cylindrical suction space 16 (see FIGS. 3 and 4) having an opening 11 (see FIGS. 2 to 4) to be described later is formed in the nozzle portion 3. An inlet 8 is provided at one end in the width direction, and an outlet 9 is provided at the other end. And
The suction port 8 and the dust bag 5 are connected by a suction channel 13 (see FIGS. 2 and 3) and a suction hose (not shown). On the other hand, the outlet 9 and the exhaust port 7 are connected to the outlet hose 1.
0 and an outlet channel 14 (see FIGS. 2 and 4).

FIG. 2 is a horizontal sectional view of the nozzle portion viewed from the direction of arrow D in FIG. As shown in FIG. 2, a cleaning surface M (FIG. 3,
An opening 11 for sucking dust present in FIG. 4) is formed. Reference numeral 12 denotes a rotating brush that is rotatably disposed on the nozzle 3 so as to face the surface M to be cleaned from the opening 11. Reference numeral 15 denotes a belt, which is suspended on a pulley 12 a formed integrally with the motor shaft 4 a of the electric blower 4 and the rotating brush 12.

Therefore, when the electric blower 4 is driven, the motor shaft 4a rotates, and this rotation is transmitted to the pulley 12a via the belt 15, and the rotary brush 12 rotates. In addition, the outer peripheral portion of the rotating brush 12 is raised with a constant thickness and spirally surrounds a predetermined phase difference (180 ° in this figure).
A pair of brush bases 12b, 12b are formed, and a plurality of bundling brushes 12c, 12c,... Are applied along the ridges of the brush bases 12b, 12b at predetermined intervals by flocking or the like.

FIG. 3 is a sectional view taken along line aa in FIG. 2, and FIG. 4 is a sectional view taken along line bb in FIG. As shown in these figures, a substantially cylindrical suction space 16 is formed above the opening 11 inside the nozzle portion 3. A suction port 8 communicating with the suction flow channel 13 is formed near the bottom surface on the one end side of the suction space 16, and near the suction upper surface on the other end side of the suction space 16. The outlet 9 communicating with the outlet channel 14 provided in the tangential direction of the cross section of FIG.

In the above configuration, when the electric blower 4 (FIG. 1) is operated by turning on the power, the suction airflow S and the wake T are simultaneously generated as shown in FIGS. 12 rotates in the direction of arrow C. The wake T passes through the exhaust port 7 (FIG. 1),
The air is blown from the outlet 9 to the suction space 16 through a return path composed of (FIG. 1) and the outlet flow path 14.

As described above, since the outlet channel 14 is provided in the tangential direction of the cross section of the suction space 16,
The wake T blown out to the suction space 16 turns as a swirling airflow U along the inner surface of the suction space 16. Accordingly, dust on the surface M to be cleaned is blown up by the swirling airflow U, and
It is scraped up by the rotation of c, is further sucked through the suction port 8, is guided to the dust bag 5 (FIG. 1) through the suction channel 13, and accumulates here. Here, as shown in the figure, when the rotating direction of the rotating brush 12 and the rotating direction of the swirling airflow U match, the swirling airflow U acts to promote the rotation of the rotating brush 12. It can reduce the load and contribute to energy saving.

<Second Embodiment> A second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a horizontal sectional view corresponding to FIG. 2 of the nozzle portion of the upright type vacuum cleaner according to the present embodiment. In FIG. 5, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The features of this embodiment are as follows. That is, as shown in FIG. 5, a suction port 17 is provided substantially in the center of the suction space 16 at the back, and two outlets 18 are provided near both ends. In this case, a swirling airflow is generated in the wake T of the electric blower 4 blown into the suction space 16 from the air outlets 18 at both ends of the suction space 16, and the rotation of the rotating brush 12 winds up dust on the surface to be cleaned and sucks the air. The air is sucked from the mouth 17 by the airflow S. Therefore, the dust collection efficiency can be further improved.

In addition, the reverse configuration, that is, the outlet 1
8 may be provided substantially at the center of the suction space 16 at the back, and two suction ports 17 may be provided near both ends. In this case, the dust on the surface to be cleaned, which is blown up by the swirling airflow, is sucked into the suction space 16 from the opening 11, and then is sucked into two suction ports 1.
The air is sucked together with the suction airflow S from the nozzles 7 and 17, and sufficient dust collection efficiency can be secured.

[0022]

As described above, according to the present invention, a suction port and a blow port communicating with a substantially cylindrical suction space provided in a nozzle portion are provided, and the wake of an electric blower is passed through a return path. The recirculation path is configured as a separate path as in the past, because the air is blown out from the outlet to the suction space to create a swirling airflow, and the dust on the surface to be cleaned can be blown up and sucked together with the suction airflow from the suction port for cleaning. compared to,
The size of the nozzle can be greatly reduced, and the dust collection efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective external perspective view of an upright type vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the nozzle unit of FIG.

FIG. 3 is a sectional view taken along line aa in FIG. 2;

FIG. 4 is a sectional view taken along line bb in FIG. 2;

FIG. 5 is a horizontal sectional view corresponding to FIG. 2 of a nozzle portion of an upright type vacuum cleaner according to a second embodiment of the present invention.

FIG. 6 is a schematic side sectional view of a conventional upright type vacuum cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Handle body 3 Nozzle part 4 Electric blower 5 Dust collection bag 6 Lid 7 Exhaust port 8,17 Suction port 9,18 Blow-out port 10 Blow-out hose 11 Opening 12 Rotary brush 13 Suction flow path 14 Blow-out flow path 15 Belt 16 Suction space M Surface to be cleaned

Claims (6)

[Claims] A first and a second hole are formed in a cylindrical suction space having an opening facing a surface to be cleaned, and an air flow is supplied from the first hole to the suction space via an electric blower. A swirling airflow is generated in the suction space by causing an airflow to flow out of the second hole, and the swirling airflow hits the surface to be cleaned facing the opening to collect dust that has flapped up from the second hole. An upright type vacuum cleaner that is sent to a room. 2. A substantially cylindrical cleaner having a cleaner main body having a built-in electric blower, a dust suction nozzle disposed in the cleaner main body, and an opening provided in the nozzle and facing a surface to be cleaned. A suction space, a suction port communicating with one end of the suction space in the axial direction for sucking dust, and a suction space communicating with the other end of the suction space in the axial direction to blow the wake of the electric blower to the suction space. An upright-type vacuum cleaner comprising: a blow-out port; and a return path for guiding the wake to the blow-out port. 3. A substantially cylindrical shape having a vacuum cleaner main body having a built-in electric blower, a dust suction nozzle disposed in the vacuum cleaner main body, and an opening provided in the nozzle and facing a surface to be cleaned. A suction space, a suction port communicating with both ends in the axial direction of the suction space, and a suction port for sucking dust, and communicating with a substantially central portion of the suction space in the axial direction to blow the wake of the electric blower to the suction space. An upright-type vacuum cleaner comprising: a blow-out port; and a return path for guiding the wake to the blow-out port. 4. A substantially cylindrical type having a cleaner main body having a built-in electric blower, a dust suction nozzle disposed in the cleaner main body, and an opening provided in the nozzle and facing a surface to be cleaned. A suction space, a suction port communicating with a substantially central portion of the suction space in the axial direction for sucking dust, and communicating with both ends of the suction space in the axial direction to blow the wake of the electric blower to the suction space. An upright-type vacuum cleaner comprising: a blow-out port; and a return path for guiding the wake to the blow-out port. 5. The upright type vacuum cleaner according to claim 1, wherein a rotatable rotary brush is provided in the suction space. 6. The suction device according to claim 6, wherein the wake is blown into the suction space from a tangential direction of a side cross section of the suction space, so that the blown wake is swirled along an inner wall of the suction space. Claim 2
An upright type vacuum cleaner according to claim 5.